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. 2006 Mar 31;3(1):48–66. doi: 10.3390/ijerph2006030007

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© 2006 by the authors; licensee MDPI, Basel, Switzerland

This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/).

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Figure 7: — Large (∼2 μm) carbon nanotube aggregate collected from a kitchen natural gas burner exhaust stream. The estimated primary nanoparticle (MWCNTs and fullerene nanopolyhedra) number is ∼8000. The TEM image shows only about one-fourth of the total aggregate.